Specifically Designed for Beer Brewing180 Micron super fine mesh can filter the tiny grain particles effectively, leaving nice, clear wort. The brew bag is heat resistant up to 392/ 200 and can withstand boiling. If you brew all grain with the Brew in the Bag method, this premium brew straining bag will meet your needs and make your brewing easy and smooth. .Food Safe & ReusableThis filter bag is made of food-grade polyester, wear-resistant, tough, durable, and odor-free. All seams are reinforced so that the strainer bag will not split during use. This nut milk bag can be washed and reusable and is ideal for holding grains for soaking, cooking or other handing. This filter bag is essential for home brewing. .Easy to Clean & Time SavingSmooth fabric is easy to clean and dry, avoiding bacteria breeding. The corners at the filter bag bottom are rounded, no problem with particles stuck in the corners. You can enjoy your brewing day more easily, no need to spend a lot of time cleaning filter bags. .Convenient Drawstring & Adjustable LockThis fine mesh bag is equipped with a drawstring and adjustable lock to tighten the bag easily. The drawstring can keep the filter bag firmly in place and prevent the filter bag from falling to the kettle bottom. The temperature at the kettle bottom is far above 392, pls avoid the brew bag touching the kettle bottom.